72770617903 has 4 divisors (see below), whose sum is σ = 73136299600. Its totient is φ = 72404936208.

The previous prime is 72770617873. The next prime is 72770617919. The reversal of 72770617903 is 30971607727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30971607727 = 73 ⋅424268599.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72770617903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72770617963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182840550 + ... + 182840947.

It is an arithmetic number, because the mean of its divisors is an integer number (18284074900).

Almost surely, 2^72770617903 is an apocalyptic number.

72770617903 is a deficient number, since it is larger than the sum of its proper divisors (365681697).

72770617903 is a wasteful number, since it uses less digits than its factorization.

72770617903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365681696.

The product of its (nonzero) digits is 777924, while the sum is 49.

The spelling of 72770617903 in words is "seventy-two billion, seven hundred seventy million, six hundred seventeen thousand, nine hundred three".